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CuCl-based ionic liquid ([HMim]Cl/CuCl) was synthesized by mixing 1-hydracid-3-methylimidazolium chloride ([HMim]Cl) with CuCl. Ionic liquid ([HMim]Cl/CuCl) was employed as an extractant remove sulfur from gasoline. It was found that [HMim]Cl/CuCl can remove sulfur-containing compounds from gasoline at room temperature. The extractive desulfurization mechanism of ionic liquid was proposed. The effects of extractive conditions on desulfurization of gasoline was investigated. The used ionic liquids can be regenerated by re-extraction using tetrachloromethane and reused five times. [ABSTRACT FROM PUBLISHER]

In our study, an effective phosphomolybdic acid/hexadecyltrimethyl-ammonium bromide catalyst for oxidative desulfurization of thiophene in a model compound was formed. The oxidation activities of thiophene for a series of heteropoly acids were estimated. The results show that the oxidation activity of thiophene increased with increasing oxidation time, oxidation temperature, and the volume of 30% H2 O2 oxidant. The optimal values are 150 min, 40°C, and 3 mL, and sulfur removal attained 96.3% when phosphotungstic acid/hexadecyltrimethylammonium bromide was used as a catalyst. [ABSTRACT FROM AUTHOR]